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@uitrit tant gatrnf @ffirp IMPROVBD MACHINE FORMAKING GRUGIBLIS.

SAMUEL R. THOMPSON, OF PORTSMOUTH, N EW HAMPSHIRE.

VLetters Patent No. 60,090, dft-ted .November 27, 1866. i

SPECIFICATION.

TO ALL WHOM IT MAY CONCERN:

Be it knownvthat I, SAMUEL R. THOMPSON, of Portsmouth, in the county of Rockingham, anidState of New Hampshire,haveinvented a new and useful improvement in. Machine for Moulding Crucibles," ;l and Ido hereby declare that the following is' a full, clear, and exact description thereof, which will ena-ble others skilled in the art to make and use the lsame, reference being had to the accompauyingdrdwings, `ibrming of this` specification, in which- N p i p y Figure 1 is -a top view of my improved machine, the binding-bar being thrown back.

Figure 2 is a vertical section of the same taken throughthe line :c x, fig. 1. i

Figure is a vertical section of the same taken through thc line yy, fig. 1.

Similar letters of reference indicate like parts. v

My invention has for its object to furnish an improved machine by means of which cruciblcs audother vessels Amay be moulded from anysuitable' plastic material perfectly and rapidly; anditconsistmiirst, ih the p combination of the cylinder, piston-head, screw piston-rod, bevel gear-wheels, shaft, and lcranlilivheelwitlreaeh 1 i other and with thc frame of the machine, for the purpose oi' forcing the material up into the mould; second,

in the combination of the case, core, andcoverof the mould with each other, when said parts are constructed and arranged as hereinafter more fully described; third, in the combination of the swinging guide-bar, swinging'bindi'ng-bar and centering screw with each other, with the cover'of the mould, and with the pillars by which they are supported;4 fourth, in the combination of the'wire, bow, and guide-rod, with each other and with the cylinder and mould, for the purpose of separatingV the moulded vessel from the material .left in the cylinder; the whole being constructed and arranged'as hereinafter more fully described. I

A is the fra-ine ofl thej machine, which is set upon and secured to a bench, table, or other suitable support.

Upon the top of the'i'rame A is placedA the hollow cylinder, B, which `is securedin placefby the set-screws C,

passing iu through the upwardly projecting ends of the posts, al, of the' frame A, as shown Vin iig. 2. D isthe piston-head, which exactly ts the interior of the cylinder B, and works up and down therein as it is moved by the operation of the screw pistonrod,`E. The piston-rod E is attached to the piston-head D, thence it` passes down through the frame A, and through the bevel gear-wheel, F, and it has a' screw-thread cut uponlit thi-oughy out its 'entire length. .The screw-thread cut upon `the rodE its into a corresponding screw-thread cut in the hole in the bevel gear-wheel, F, through which the said screw-rod passes, so that by the revolution of the said gear-wheel the rod E, and with it the piston-head D, will be raised or lowered.` Grise bevel gear-wheel, the teeth of which meshinto the teeth o f the gear-wheel F, as shown in lig. 3. The wheel G is attached to thc end of the shaft II, which revolves in bearings in supports I, attached to the frame A,V as shown. To the other end of 'the shaft H is attached the crank-wheel, J, which is made large and heavy, in proportion to the size of `the machine, so as 4to give to the machine sufcient momentum to iill the mould 'with the plastic material. K is they case or cylinder of the mould, which is lined with clay, h', or other ,suitable materiahand thel lower edge of p which rests upon the upper edge of the cylinder B, as shown in iigs. 2 and 3. The interior of` the lining', Ic',

ortlre cavity of the mould, is made of the exact form which it is desired the outside of the crucible or other vessel' should haveff Lv is the core, which is made of the form of Vthe interior of the crucible or other vessel,

'and the upper end of 'which is secured to the cover M, in such a position that when in place it may hang exactly ifa-the centre of the cavity of the mould, making the Vsidesot' the crucible of uniformthickness.` The core L p may be made of any suitable material, but I prefer to make it of wood, as answerin'gthe purpose better than p other materials. M is the cover which rests uponthe upper edge of the case or cylinder K, and is guided 'into y. its proper position by guide-pins, N, attached to the upper edge of the case or cylinder K, and entering'holes in the cover M, as shown in iig. 2. Upon the upper side of the cover M, exactly at its centre, is formed a p cylindrical projectiomm, having a hole or depression formed 'in its centre, asfshow in igs. 1, 2, and '3, i'or exactly centering the mould when being placed in position upon the upper edge of .the cylinder B. The cylindrical projections fm, are all made of Vexactly the same size, whatever maybe the size of the mould totheeover of whichit is attached, so that it may always exactly lit into the curved depression in the guide-barR. O and p P are pillars, the loiver ends of which are attached to the projecting flange, b', formed around the upper edge of the cylinder B." To the upper part of the post l? is pivoted the end of the guide-barR, said bar being `held in the proper position by the nut S. Upon the upper part of the post P is cut a screwfthread, so thatthe elevation of the guide-bar, R, may be adjusted to the height of the mould to be used.V The edge of the bar Rfwhich is towards the side of the machine at which the mould is inserted is curved o1" hollowed, as shown in iig. l, to serve as a guide in placing the said mould in the right position, and in the rear edge is formed a notch which its upon the post 0, as shown'in iigs. 1 and 3. 1" is a handle attached to the end of the bar R, for convenience in operating it. To the upper end of the post l? is pivoted the end of the binding-har, T, in the front edge of which is formed a notch, into which the upper end of the post O enters when'the bar is brought into the positione shown in fig. 3. t1 is a lhandle attached to the end of the bar T, for convenience in operating it. Upon thev middle part of the upper side of the bar T, is formed a projection, t2, to give a suiiicient bearing'to the binding and centering-screw, U, which passes down through the said bar. The lower end of the screw l.U is rounded 01T to enter the hole or depression in the projection m1, of the cover Mso as to exactly centre the said mould at the same time that it binds it securely in its place. Upon the upper end of the screw U is formeda hand-wheel, u', for convenience in operating the said screw. V is a b ow or curved bar, to the middle of which 'is attached a handle, v, having a downwardly projecting ear,I c, through which passes the guide-rod W, along which the nbow' V slides. Thevguide-rod W is pivoted to the lower end of the post O, as shown in iig. 3. The ends of the bow V are connected by a wire, 113, which, when the bowfl7 is pushed forward between the lewe/1j edge of the case K of the mould, and the' upper edge'of the cylinder B, separating or cutting the bottom of the moulded crucible or other vessel from the material remaining in the said cylinder, B. X is an apron attached to the ange b', of the cylinder B, for convenience in'iilling the said cylinder with the plastic material fromwhich the vessels are to be moulded. Y is an a ron. attached to the anfre Za', of the c linder B, for convenience in lacn and P o y P g Yremoving the mould The outer ends of the aprons er platforms, X and Y, are supported by braces, cv', y', as shown in g. 2. In using the machine, the piston-head D is turned down to the bottom of the vcylinder B, and the said cylinder is filled with the plastic material. The mould is then secured in position,.' as before described., and the piston-head forced upward, forcing the plastic material into the mould, the air at the same time escaping through the air-holes m2, shown in iig. 3. When the mould is filled the bottom of the moulded vessel is separated or cut oil` 'from the material in the cylinder B, by meansof the wire, v3, and bow V', as before described.

In removing the moulded vessel from the mould, the pin m3 is taken out, which admits the air between the core L and the said vessel, and allows the said core to be easily removed.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the cylinder B, piston-head D, screw piston-rod E, bevel gearfwheels F and Gr, shaft H, and crank-wheel J,'with each other and'with' the frame A of the machine, substantially asv herein described, and for the purpose set forth.

2. The combinationof the case K, core L, and cover M', with each other, when 4said parts are constructed and arranged substantially as herein described, and for the purpose set forth.

3. The combination of the swinging guide-bar R, the swinging binding-bar T, and the binding and centering screw U, with each other, with the cover M, and with the posts Oand P, substantially as described, and for the purpose set forth.' a 4 I 4. The combination of the bow V, wire 'v1- and guide-rod W, with each other, and with the cylinders B and K, substantially as hcrein'described, and for the purpose set forth.

SAMUEL R. THOMPSON.

Witnesses:

ALBERr R; HATCH, CALVIN PAGE.'- 

